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Diffstat (limited to '')
| -rw-r--r-- | src/db/upnp/Directory.cxx | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/src/db/upnp/Directory.cxx b/src/db/upnp/Directory.cxx new file mode 100644 index 000000000..a42719e4d --- /dev/null +++ b/src/db/upnp/Directory.cxx @@ -0,0 +1,184 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "Directory.hxx" +#include "Util.hxx" +#include "Expat.hxx" + +#include <string> +#include <vector> + +#include <string.h> + +static const char *const upnptags[] = { + "upnp:artist", + "upnp:album", + "upnp:genre", + "upnp:originalTrackNumber", + nullptr, +}; + +gcc_pure +static UPnPDirObject::ItemClass +ParseItemClass(const char *name) +{ + if (strcmp(name, "object.item.audioItem.musicTrack") == 0) + return UPnPDirObject::ItemClass::MUSIC; + else if (strcmp(name, "object.item.playlistItem") == 0) + return UPnPDirObject::ItemClass::PLAYLIST; + else + return UPnPDirObject::ItemClass::UNKNOWN; +} + +gcc_pure +static int +ParseDuration(const std::string &duration) +{ + const auto v = stringToTokens(duration, ":"); + if (v.size() != 3) + return 0; + return atoi(v[0].c_str())*3600 + atoi(v[1].c_str())*60 + atoi(v[2].c_str()); +} + +/** + * An XML parser which builds directory contents from DIDL lite input. + */ +class UPnPDirParser final : public CommonExpatParser { + std::vector<std::string> m_path; + UPnPDirObject m_tobj; + +public: + UPnPDirParser(UPnPDirContent& dir) + :m_dir(dir) + { + } + UPnPDirContent& m_dir; + +protected: + virtual void StartElement(const XML_Char *name, const XML_Char **attrs) + { + m_path.push_back(name); + + switch (name[0]) { + case 'c': + if (!strcmp(name, "container")) { + m_tobj.clear(); + m_tobj.type = UPnPDirObject::Type::CONTAINER; + + const char *id = GetAttribute(attrs, "id"); + if (id != nullptr) + m_tobj.m_id = id; + + const char *pid = GetAttribute(attrs, "parentID"); + if (pid != nullptr) + m_tobj.m_pid = pid; + } + break; + + case 'i': + if (!strcmp(name, "item")) { + m_tobj.clear(); + m_tobj.type = UPnPDirObject::Type::ITEM; + + const char *id = GetAttribute(attrs, "id"); + if (id != nullptr) + m_tobj.m_id = id; + + const char *pid = GetAttribute(attrs, "parentID"); + if (pid != nullptr) + m_tobj.m_pid = pid; + + const char *item_class_name = + GetAttribute(attrs, "upnp:class"); + if (item_class_name != nullptr) + m_tobj.item_class = + ParseItemClass(item_class_name); + } + break; + + case 'r': + if (!strcmp(name, "res")) { + // <res protocolInfo="http-get:*:audio/mpeg:*" size="5171496" + // bitrate="24576" duration="00:03:35" sampleFrequency="44100" + // nrAudioChannels="2"> + + const char *duration = + GetAttribute(attrs, "duration"); + if (duration != nullptr) + m_tobj.duration = ParseDuration(duration); + } + + break; + } + } + + bool checkobjok() { + if (m_tobj.m_id.empty() || m_tobj.m_pid.empty() || + m_tobj.m_title.empty() || + m_tobj.item_class == UPnPDirObject::ItemClass::UNKNOWN) + return false; + + return true; + } + + virtual void EndElement(const XML_Char *name) + { + if (!strcmp(name, "container")) { + if (checkobjok()) { + m_dir.m_containers.push_back(m_tobj); + } + } else if (!strcmp(name, "item")) { + if (checkobjok()) { + m_dir.m_items.push_back(m_tobj); + } + } + + m_path.pop_back(); + } + + virtual void CharacterData(const XML_Char *s, int len) + { + std::string str(s, len); + trimstring(str); + switch (m_path.back()[0]) { + case 'd': + if (!m_path.back().compare("dc:title")) + m_tobj.m_title += str; + break; + case 'r': + if (!m_path.back().compare("res")) { + m_tobj.url = str; + } + break; + case 'u': + for (auto i = upnptags; *i != nullptr; ++i) + if (!m_path.back().compare(*i)) + m_tobj.m_props[*i] += str; + break; + } + } +}; + +bool +UPnPDirContent::parse(const std::string &input, Error &error) +{ + UPnPDirParser parser(*this); + return parser.Parse(input.data(), input.length(), true, error); +} |